Overview

overview

10

Static

static

1

b3e1e9d97d...7d.exe

windows7-x64

10

b3e1e9d97d...7d.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    145s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-02-2024 14:23

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General

  • Target

    b3e1e9d97d74c416c2a30dd11858789af5554cf2de62f577c13944a19623777d.exe

  • Size

    313KB

  • MD5

    fe1bc60a95b2c2d77cd5d232296a7fa4

  • SHA1

    c07dfdea8da2da5bad036e7c2f5d37582e1cf684

  • SHA256

    b3e1e9d97d74c416c2a30dd11858789af5554cf2de62f577c13944a19623777d

  • SHA512

    266c541a421878e1e175db5d94185c991cec5825a4bc50178f57264f3556080e6fe984ed0380acf022ce659aa1ca46c9a5e97efc25ff46cbfd67b9385fd75f89

  • SSDEEP

    6144:nl578cxdGY87FohbnmM2i8ito7wTmCbL94KCT3OAmK:nl59zH8MiM2z+NLQBN

Score
10/10
cerberdiscoveryevasionransomware

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Roaming\Microsoft\OneNote\16.0\_R_E_A_D___T_H_I_S___KVVI9HK_.txt

Family

cerber

Ransom Note
Hi, I'am CRBR ENCRYPTOR ;) ----- ALL YOUR DOCUMENTS, PH0T0S, DATABASES AND OTHER IMPORTANT FILES HAVE BEEN ENCRYPTED! ----- The only one way to decrypt your files is to receive the private key and decryption program. To receive the private key and decryption program go to any decrypted folder, inside there is the special file (*_R_E_A_D___T_H_I_S_*) with complete instructions how to decrypt your files. If you cannot find any (*_R_E_A_D___T_H_I_S_*) file at your PC, follow the instructions below: ----- 1. Download "Tor Browser" from https://www.torproject.org/ and install it. 2. In the "Tor Browser" open your personal page here: http://xpcx6erilkjced3j.onion/570B-3958-6710-0098-B9C2 Note! This page is available via "Tor Browser" only. ----- Also you can use temporary addresses on your personal page without using "Tor Browser". ----- 1. http://xpcx6erilkjced3j.1n5mod.top/570B-3958-6710-0098-B9C2 2. http://xpcx6erilkjced3j.19kdeh.top/570B-3958-6710-0098-B9C2 3. http://xpcx6erilkjced3j.1mpsnr.top/570B-3958-6710-0098-B9C2 4. http://xpcx6erilkjced3j.18ey8e.top/570B-3958-6710-0098-B9C2 5. http://xpcx6erilkjced3j.17gcun.top/570B-3958-6710-0098-B9C2 ----- Note! These are temporary addresses! They will be available for a limited amount of time! -----
URLs

http://xpcx6erilkjced3j.onion/570B-3958-6710-0098-B9C2

http://xpcx6erilkjced3j.1n5mod.top/570B-3958-6710-0098-B9C2

http://xpcx6erilkjced3j.19kdeh.top/570B-3958-6710-0098-B9C2

http://xpcx6erilkjced3j.1mpsnr.top/570B-3958-6710-0098-B9C2

http://xpcx6erilkjced3j.18ey8e.top/570B-3958-6710-0098-B9C2

http://xpcx6erilkjced3j.17gcun.top/570B-3958-6710-0098-B9C2

Signatures

  • Cerber

    Cerber is a widely used ransomware-as-a-service (RaaS), first seen in 2017.

    ransomwarecerber
  • Contacts a large (1099) amount of remote hosts 1 TTPs

    This may indicate a network scan to discover remotely running services.

    discovery
  • Modifies Windows Firewall 2 TTPs 2 IoCs
    evasion
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 1 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in System32 directory 38 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
    ransomware
  • Drops file in Program Files directory 20 IoCs
  • Drops file in Windows directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Kills process with taskkill 1 IoCs
    evasion
  • Modifies registry class 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b3e1e9d97d74c416c2a30dd11858789af5554cf2de62f577c13944a19623777d.exe
    "C:\Users\Admin\AppData\Local\Temp\b3e1e9d97d74c416c2a30dd11858789af5554cf2de62f577c13944a19623777d.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Enumerates connected drives
    • Drops file in System32 directory
    • Sets desktop wallpaper using registry
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1856
    • C:\Windows\SysWOW64\netsh.exe
      C:\Windows\system32\netsh.exe advfirewall set allprofiles state on
      2⤵
      • Modifies Windows Firewall
      PID:4180
    • C:\Windows\SysWOW64\netsh.exe
      C:\Windows\system32\netsh.exe advfirewall reset
      2⤵
      • Modifies Windows Firewall
      PID:208
    • C:\Windows\SysWOW64\mshta.exe
      "C:\Windows\SysWOW64\mshta.exe" "C:\Users\Admin\Desktop\_R_E_A_D___T_H_I_S___OBGLDP_.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
      2⤵
        PID:5112
      • C:\Windows\SysWOW64\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\_R_E_A_D___T_H_I_S___GW7SUZ4_.txt
        2⤵
        • Opens file in notepad (likely ransom note)
        PID:1532
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /d /c taskkill /f /im "b" > NUL & ping -n 1 127.0.0.1 > NUL & del "C" > NUL && exit
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4264
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /f /im "b"
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:2676
        • C:\Windows\SysWOW64\PING.EXE
          ping -n 1 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:656

    Network

    MITRE ATT&CK Matrix ATT&CK v13

    Initial Access

    Execution

    Persistence

    Create or Modify System Process

    1
    T1543

    Windows Service

    1
    T1543.003

    Privilege Escalation

    Create or Modify System Process

    1
    T1543

    Windows Service

    1
    T1543.003

    Defense Evasion

    Impair Defenses

    1
    T1562

    Disable or Modify System Firewall

    1
    T1562.004

    Modify Registry

    1
    T1112

    Credential Access

    Discovery

    Network Service Discovery

    1
    T1046

    Query Registry

    2
    T1012

    System Information Discovery

    3
    T1082

    Peripheral Device Discovery

    1
    T1120

    Remote System Discovery

    1
    T1018

    Lateral Movement

    Collection

    Exfiltration

    Command and Control

    Impact

    Defacement

    1
    T1491

    Resource Development

    Reconnaissance

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Roaming\Microsoft\OneNote\16.0\_R_E_A_D___T_H_I_S___BW3OK4_.hta
      Filesize

      76KB

      MD5

      8598bbc49a2e30d20da82ccb31325beb

      SHA1

      85ed88c39ff776fc826186464e182f597c82705d

      SHA256

      e47624de2f375b5ce8e2cf2378f7f35e502eab8a9a9ed8df7458e854d282c890

      SHA512

      76e16fb271289c27e4e334e845538eca3dbcc903a66864225d78ff8997f0ce732403ef7cc9e25f7aef531d700112cf70a8001f9af6759a2568cc768b6a12819a

      Download Submit
    • C:\Users\Admin\AppData\Roaming\Microsoft\OneNote\16.0\_R_E_A_D___T_H_I_S___KVVI9HK_.txt
      Filesize

      1KB

      MD5

      07fd812464ab2995bd780a6b09d3b39a

      SHA1

      bfb3294d3e1f5562de683621171d6cf61808705a

      SHA256

      aaa7a5f30366619853e2ee2b2caaaf516aac5a52909570febe8e556619ff1a23

      SHA512

      5f7c7324aff5a978e51d649f0774ad3c3418e5becea0f4405dc00526640114b707e97c80f8a20380c39b9fdefc852d9f58ded0169d1aa4e46518ecb04eb8387c

      Download Submit
    • memory/1856-0-0x0000000005E10000-0x0000000005E41000-memory.dmp
      Filesize

      196KB

      Download
    • memory/1856-1-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

      Download
    • memory/1856-5-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

      Download
    • memory/1856-7-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

      Download
    • memory/1856-11-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

      Download
    • memory/1856-21-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

      Download
    • memory/1856-377-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

      Download
    • memory/1856-376-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

      Download
    • memory/1856-398-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

      Download